Where does “alongside” come from?

Alongside comes from Old English andlang, combining the prefix and- with Old English sīdǭ, from Proto-Germanic sīdǭ meaning side.

alongside (English): Along the side; by the side; side by side with;...

Definitions

  1. Along the side; by the side; side by side with;...

Ancestry of “alongside”, step by step

alongside traces back through two separate lines of ancestry.

via English Side

StepLanguageWordMeaning
1EnglishSideA bounding straight edge of a two-dimensional shape
2Middle Englishsidecustom
3Old Englishsīdeside, flank
4Proto-West Germanic*sīdāside
5Medieval Latinsida
6Late LatinsetaAlternative form of saeta; hair, bristle; bristle
7Latinsaetaa bristle, hair on an animal; silk
8Proto-Italicsaitā
9Proto-Indo-Europeanséh₂ito-
10Proto-Indo-Europeansh₂ey-to bind, fetter
11Proto-Indo-Europeanseh₂-to satiate, satisfy

via English along

StepLanguageWordMeaning
1EnglishalongBy the length of; in a line with the length of;...
2Old Englishandlangthroughout, all along; along
3Old Englishand-against, opposing; in return, back; facing,...
4Proto-West Germanicanda-against, opposing; in return, back; facing,...
5Proto-Germanicanda-against, opposing; un-, de-
6Proto-Indo-Europeanh₂éntiopposite; near; in front
7Proto-Indo-Europeanh₂éntsforehead; front
8Proto-Indo-Europeanh₂ent-face; forehead; front
9Proto-Indo-Europeanh₂en-on, onto
Every word from Proto-Indo-European seh₂-